When it comes to the term "strong poison," there are several synonyms that can be used to describe it. The word "toxic" can be used to describe a substance that is poisonous and can cause harm to humans if ingested. Another synonym is "venomous," which is often associated with snakes and other animals that can inject poisonous substances into their prey. "Lethal" is another term that can be used to describe a strong poison, indicating that it has the potential to cause death. "Deadly" is also a common term used to describe highly poisonous substances that can be fatal to humans and animals alike. Overall, when looking for a synonym for strong poison, these words may come in handy.